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Provide any two values and click Calculate to get the third.
Leave one field empty — the calculator will solve for it.
A percentage expresses a number as a fraction of 100. Percentages are used for discounts, tax rates, interest rates, test scores, and statistical comparisons in everyday life.
To find what percentage one number is of another: (part ÷ whole) × 100. To find a percentage of a number: (percentage ÷ 100) × number. For example, 20% of 500 = 100.
Percentage change = ((New Value − Old Value) ÷ Old Value) × 100. A positive result means an increase; a negative result means a decrease from the original value.
Percentage difference compares two values without a clear reference: (|A − B| ÷ ((A + B) ÷ 2)) × 100. This differs from percentage change which always uses the original value as the reference.
A percentage expresses a number as a fraction of 100. Percentages are used for discounts, tax rates, interest rates, test scores, and statistical comparisons in everyday life.
Use (part / whole) x 100. For example, to find what percentage 25 is of 200, divide 25 by 200 and multiply by 100.
Use (percentage / 100) x number. For example, 20% of 500 = 100.
Percentage change = ((New Value - Old Value) / Old Value) x 100. A positive result means an increase; a negative result means a decrease from the original value.
Percentage difference compares two values without a clear reference using (|A - B| / ((A + B) / 2)) x 100, whereas percentage change always uses the original value as the reference point.